CN102052702A - Heating system and method by using power plant steam turbine bearing cooling water through heat pump - Google Patents

Heating system and method by using power plant steam turbine bearing cooling water through heat pump Download PDF

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Publication number
CN102052702A
CN102052702A CN 201010551122 CN201010551122A CN102052702A CN 102052702 A CN102052702 A CN 102052702A CN 201010551122 CN201010551122 CN 201010551122 CN 201010551122 A CN201010551122 A CN 201010551122A CN 102052702 A CN102052702 A CN 102052702A
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China
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water
steam turbine
heat
heat pump
steam
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CN 201010551122
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CN102052702B (en
Inventor
于刚
张永生
张光
卞双
鞠翠玲
邢长燕
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North China Electric Power University
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North China Electric Power University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency

Abstract

The invention belongs to a heating system and method by using a power plant bearing cooling water heat pump in the field of energy. The system comprises a steam turbine, a steam turbine bearing cooling system, a steam absorption heat pump, a water-water heat exchanger, a low-pressure heater, a heating network heater, corresponding pipelines and auxiliary equipment. The system uses power plant bearing cooling water as a low-temperature heat source of the absorption heat pump and uses medium-pressure steam applying work in a steam turbine unit as a driving heat source of the heat pump; the heat sources exchange heat in the absorption heat pump system; discharged water is transferred to a regenerative heating system of the steam turbine unit to be used as boiler feed water; heat which is obtained by the heat pump system from a high-temperature heat source is solely supplied to heat users in winter or is coupled with a traditional cogeneration system to be supplied to heat users in winter; and the condensed water of the steam turbine unit is heated through a regenerative heater of the water-water heat exchanger in summer to improve the temperature of boiler feed water. Therefore, the bearing temperature of the power plant steam turbine unit is lowered, the safe operation of the steam turbine unit is realized and the thermal economy of the steam turbine unit is improved by outputting heat for heating through the heat pump.

Description

Power plant steam turbine bearing cooling water heat pump heating system and method
Technical field
The invention belongs to energy field, be particularly related to a kind of heating system and method for power plant steam turbine bearing cooling water heat pump, this system is by the work of power plant steam turbine bearing cooling water heat pump, reduce power plant steam turbine group bearing temperature and realized the safe operation of unit, on the other hand the heat that obtains is outwards exported heat supply by heat pump, realize the cascade utilization of energy, improved the heat-economy of Steam Turbine system.
Technical background
The bearing cooling of Thermal Power Station's Steam Turbine is one of problem that influences unit operation safety, and during the steam turbine high speed operation, friction can produce a large amount of heats in the bearing, if bearing temperature is too high, can cause the vibration even the shutdown of unit.By the continuous circular flow kinetic energy of the lubricating oil system in the bearing these heats are taken away in the unit operation, lubricating oil is cooled off by other cooling water system then, thereby unit operation is played the heat radiation cooling effect.In the actual motion, the cooling water system here needs external environment to cool off the reduction temperature, and a large amount of heats is lost in the environment, on the other hand, summer, cooling effect was poor owing to the environment temperature height, and bearing cools off the operation that frequent poor effect influences whole Steam Turbine.
Summary of the invention
The present invention proposes a kind of power plant steam turbine group bearing cooling water heat pump heating system and method.
A kind of power plant steam turbine group bearing cooling water heat pump heating system is characterized in that this system comprises steam turbine, steam turbine bearing cooling system, steam absorption heat pump, water water-to-water heat exchanger, low-pressure heater and heat exchangers for district heating; The arbor of the steam turbine 1 of this system connects steam turbine bearing cooling system 3, and steam turbine bearing cooling system 3 connects the evaporimeter 7-2 of steam absorption heat pump 7 by the recirculated cooling water pipeline; Drawing gas of steam turbine 1 connects the generator 7-1 of steam absorption heat pump 7 by pipeline, the cooling back forms among the generator 7-1 hydrophobic passes through the feedwater side that drain water piping is connected to the low-pressure heater 6 of Steam Turbine Regenerative System; The water supply end of the condenser 7-4 of steam absorption heat pump 7 connects Water-supplying tee joint valve 9, a road of Water-supplying tee joint valve 9 connect to be supplied with hot user's 11 heat exchangers for district heating 10, condenser 7-4 the backwater end connect the heat exchangers for district heating 10 of supplying with hot users 11 by backwater triple valve 8 and form water-flow circuits; Water-supplying tee joint valve 9 and backwater triple valve 8 are connected the water water-to-water heat exchanger 5 high-temperature water lateral line two ends of Steam Turbine Regenerative System respectively; The two ends of the water at low temperature side of the water water-to-water heat exchanger 5 of Steam Turbine Regenerative System connect the bleeder heater water side of feedwater side with the relevant corresponding temperature of condensate pump 4 sides of low-pressure heater 6 respectively.
The heating method of a kind of power plant bearing cooling water heat pump, it is characterized in that, described power plant bearing cooling water heat pump heating is to utilize the low-temperature heat source of power plant steam turbine bearing cooling water as absorption heat pump, the steam of the lower pressure by doing merit in the electric turbine is as the driving heat source of heat pump, the heat that the heat pump high temperature heat source obtains is used for heating in winter, connect the feed heating system heating boiler feedwater of steam turbine in summer.
The invention has the beneficial effects as follows and on the one hand reduced the safe operation that power plant steam turbine group bearing temperature has been realized unit, the heat that obtains in the heat pump high temperature heat source is outwards supplied with hot user in winter on the other hand, the condensate water raising boiler feed temperature in summer by heat exchanger heating Steam Turbine.
Description of drawings
Fig. 1 is the heating system version schematic diagram of power plant steam turbine group bearing cooling water heat pump.
Among the figure: the 1st, steam turbine, the 2nd, condenser, the 3rd, steam turbine bearing cooling system, the 4th, condensate pump, the 5th, water water-to-water heat exchanger, the 6th, low-pressure heater, the 7th, steam absorption heat pump, the 8th, backwater triple valve, the 9th, Water-supplying tee joint valve, the 10th, heat exchangers for district heating, the 11st, hot user, 7-1 are generators, and 7-2 is an evaporimeter, 7-3 is a throttling arrangement, and 7-4 is a condenser.
The specific embodiment
The present invention proposes a kind of power plant steam turbine group bearing cooling water heat pump heating system and method.
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Embodiment 1
Fig. 1 is the heating system version schematic diagram of power plant steam turbine group bearing cooling water heat pump, this system comprises steam turbine, condenser, steam turbine bearing cooling system, steam absorption heat pump, condensate pump, water water-to-water heat exchanger, low-pressure heater, supplies backwater triple valve, heat exchangers for district heating and auxiliary device etc., adopts corresponding pipeline to connect to form.
Concrete workflow is as follows: the steam discharge of steam turbine 1 enters in the condenser 2 and is condensed into water, is sent to boiler as feedwater after the heat regenerative system of compositions such as condensate pump 4, low-pressure heater 6; Liberated heat is by 3 coolings of steam turbine bearing cooling system in rotating at a high speed for steam turbine 1, and recirculated water cooling pipeline connects the low-temperature heat source of the evaporimeter 7-2 of steam absorption heat pump 7 as absorption heat pump 7; Do drawing gas of merit in the steam turbine 1 and connected the generator 7-1 of steam absorption heat pump 7 by pipeline, this steam is as the driving heat source of absorption heat pump 7, be cooled after the steam heat release, the hydrophobic of cooling formation is connected to the part of the low-pressure heater 6 of Steam Turbine Regenerative System as boiler feedwater by drain water piping; Condenser 7-4 is the high temperature heat source of steam absorption heat pump 7, and it emits heat to the external world, and the high-temperature water among the condenser 7-4 connects Water-supplying tee joint valve 9; In winter, by the switching of Water-supplying tee joint valve 9, the high-temperature water that steam absorption heat pump 7 produces is supplied with heat exchangers for district heating 10 and is further supplied with hot user and is used for heating; In summer, by the switching of Water-supplying tee joint valve 9, the high-temperature water that steam absorption heat pump 7 produces is by the feedwater of water water-to-water heat exchanger 5 heating Steam Turbine Regenerative System; Heat exchangers for district heating 10 and heater 5 all are the water water-to-water heat exchangers, and its backwater all connects backwater triple valve 8, and the condenser 7-4 by triple valve connection steam absorption heat pump 7 forms water-flow circuit; Throttling arrangement 7-3 is connected the end of condenser 7-4 and evaporimeter 7-2, and generator 7-1 is connected the other end of condenser 7-4 and evaporimeter 7-2.
At last, it is also to be noted that what more than enumerate only is specific embodiments of the invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.
The present invention can summarize with other the concrete form without prejudice to spirit of the present invention and principal character.Therefore, above-mentioned embodiment of the present invention all can only be thought can not limit the present invention to explanation of the present invention, and claims have been pointed out scope of the present invention, and scope of the present invention is not all pointed out in above-mentioned explanation.Therefore, in implication suitable and any change in the scope, all should think to be included in the scope of claims with claims of the present invention.

Claims (2)

1. the heating system of power plant's bearing cooling water heat pump is characterized in that, this system comprises steam turbine, steam turbine bearing cooling system, steam absorption heat pump, water water-to-water heat exchanger, low-pressure heater and heat exchangers for district heating; The arbor of the steam turbine of this system (1) connects steam turbine bearing cooling system (3), and steam turbine bearing cooling system (3) connects the evaporimeter (7-2) of steam absorption heat pump (7) by the recirculated cooling water pipeline; Drawing gas of steam turbine (1) connects the generator (7-1) of steam absorption heat pump (7), the hydrophobic feedwater side that is connected to the low-pressure heater (6) of Steam Turbine Regenerative System by drain water piping of generator (7-1) by pipeline; The water supply end of the condenser (7-4) of steam absorption heat pump (7) connects Water-supplying tee joint valve (9), a road of Water-supplying tee joint valve (9) connects the heat exchangers for district heating (10) of supplying with hot user (11), and the backwater end of condenser (7-4) connects the heat exchangers for district heating (10) of supplying with hot user (11) by backwater triple valve (8) and forms the loop; By the control of triple valve, in another loop, backwater triple valve (8) and Water-supplying tee joint valve (9) are connected water water-to-water heat exchanger (5) the high temperature heat release side of Steam Turbine Regenerative System respectively; The two ends of water water-to-water heat exchanger (5) the water at low temperature side of Steam Turbine Regenerative System connect the feed-water inlet of low-pressure heater (6) and the bleeder heater water side of condensate pump (4) side corresponding temperature respectively.
2. the heating method of power plant's bearing cooling water heat pump, it is characterized in that, described power plant bearing cooling water heat pump heating is to utilize the low-temperature heat source of power plant steam turbine bearing cooling water as absorption heat pump, the steam of the lower pressure by doing merit in the steam turbine is as the driving heat source of absorption heat pump, the heat that the heat pump high temperature heat source obtains is used for heating in winter, connect the feed heating system heating boiler feedwater of steam turbine in summer; Concrete workflow is as follows: steam turbine (1) steam discharge enters condenser (2) and is condensed into water, is sent to boiler as boiler feedwater after the heat regenerative system of condensate pump (4) and low-pressure heater (6) composition; Liberated heat is by steam turbine bearing cooling system (3) cooling in rotating at a high speed for steam turbine (1), and the cool cycles water lines connects the low-temperature heat source of the evaporimeter (7-2) of steam absorption heat pump (7) as absorption heat pump (7); Doing the part of merit in the steam turbine (1) draws gas by the generator (7-1) of pipeline connection steam absorption heat pump (7), this steam is as the driving heat source of absorption heat pump (7), be cooled after the steam heat release, the hydrophobic of cooling formation is connected to the part of the low-pressure heater (6) of Steam Turbine Regenerative System as boiler feedwater by drain water piping; Condenser (7-4) is the high temperature heat source of steam absorption heat pump (7), and it emits heat to the external world, and the high-temperature water in the condenser (7-4) connects Water-supplying tee joint valve (9); In winter, by the switching of Water-supplying tee joint valve (9), the high-temperature water that steam absorption heat pump (7) produces is supplied with heat exchangers for district heating (10) and is further supplied with hot user and is used for heating; In summer, by the switching of Water-supplying tee joint valve (9), the high-temperature water that steam absorption heat pump (7) produces is by the feedwater of water water-to-water heat exchanger (5) heating Steam Turbine Regenerative System; Heat exchangers for district heating (10) all is connected backwater triple valve (8) with its backwater of water water-to-water heat exchanger (5), by the condenser (7-4) of triple valve connection steam absorption heat pump (7), forms water-flow circuit.Like this, the heat in the heat pump high temperature heat source is outwards supplied with hot user in winter, the condensate water raising boiler feed temperature in summer by heat exchanger heating Steam Turbine.This method has reduced the safe operation that power plant steam turbine group bearing temperature has been realized unit on the one hand, on the other hand its heat is outwards exported the cascade utilization that heat supply has realized energy by heat pump, having improved with Steam Turbine power plant is the heat-economy of the central heating system at center.
CN 201010551122 2010-11-18 2010-11-18 Heating method by using power plant steam turbine bearing cooling water through heat pump Expired - Fee Related CN102052702B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102345895A (en) * 2011-07-20 2012-02-08 双良节能系统股份有限公司 Steam-water heating system for thermal power plant
CN103090358A (en) * 2013-01-23 2013-05-08 中国神华能源股份有限公司 Cooling water heat recovery system of power plant and heat recovery method
CN104776479A (en) * 2015-04-02 2015-07-15 南京祥源动力供应有限公司 Energy-saving boiler shaft waste heat recovery system
CN105546564A (en) * 2016-01-06 2016-05-04 浙江浙能节能科技有限公司 Energy-saving recycling system for low-grade heat energy in smoke pollutant treatment of thermal power plant
CN106150567A (en) * 2016-07-26 2016-11-23 中国神华能源股份有限公司 Steam turbine synergistic device and the synergisting method of steam turbine
CN111780195A (en) * 2020-05-18 2020-10-16 华电电力科学研究院有限公司 Supercritical unit improved heat supply network drainage system and working method thereof

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JPH0242102A (en) * 1988-08-02 1990-02-13 Hitachi Ltd Method for recovering thermal energy and apparatus thereof
CN101231004A (en) * 2008-02-28 2008-07-30 清华大学 Large temperature-difference central heating system
CN101793171A (en) * 2009-12-21 2010-08-04 江苏双良空调设备股份有限公司 Combined heat and power system for directly recovering exhaust afterheat of power station steam turbine by absorption heat pump
CN201866832U (en) * 2010-11-18 2011-06-15 华北电力大学 Steam turbine bearing cooling water heat pump heating system of power plant

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093868A (en) * 1974-04-29 1978-06-06 Manning John I Method and system utilizing steam turbine and heat pump
JPH0242102A (en) * 1988-08-02 1990-02-13 Hitachi Ltd Method for recovering thermal energy and apparatus thereof
CN101231004A (en) * 2008-02-28 2008-07-30 清华大学 Large temperature-difference central heating system
CN101793171A (en) * 2009-12-21 2010-08-04 江苏双良空调设备股份有限公司 Combined heat and power system for directly recovering exhaust afterheat of power station steam turbine by absorption heat pump
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102345895A (en) * 2011-07-20 2012-02-08 双良节能系统股份有限公司 Steam-water heating system for thermal power plant
CN102345895B (en) * 2011-07-20 2013-06-05 双良节能系统股份有限公司 Steam-water heating system for thermal power plant
CN103090358A (en) * 2013-01-23 2013-05-08 中国神华能源股份有限公司 Cooling water heat recovery system of power plant and heat recovery method
CN104776479A (en) * 2015-04-02 2015-07-15 南京祥源动力供应有限公司 Energy-saving boiler shaft waste heat recovery system
CN105546564A (en) * 2016-01-06 2016-05-04 浙江浙能节能科技有限公司 Energy-saving recycling system for low-grade heat energy in smoke pollutant treatment of thermal power plant
CN106150567A (en) * 2016-07-26 2016-11-23 中国神华能源股份有限公司 Steam turbine synergistic device and the synergisting method of steam turbine
CN106150567B (en) * 2016-07-26 2017-11-14 中国神华能源股份有限公司 The synergisting method of steam turbine synergistic device and steam turbine
CN111780195A (en) * 2020-05-18 2020-10-16 华电电力科学研究院有限公司 Supercritical unit improved heat supply network drainage system and working method thereof
CN111780195B (en) * 2020-05-18 2021-09-03 华电电力科学研究院有限公司 Supercritical unit improved heat supply network drainage system and working method thereof

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